| 词条 | (5119) 1988 RA1 |
| 释义 |
| minorplanet = yes | name = {{mp|(5119) 1988 RA|1}} | background = #C2FFFF | image = | image_size = | caption = | discovery_ref = [1] | discoverer = P. Jensen | discovery_site = Brorfelde Obs. | discovered = 8 September 1988 | mpc_name = (5119) {{mp|1988 RA|1}} | alt_names = {{mp|1988 RA|1}} | pronounced = | named_after = | mp_category = Jupiter trojan [1] {{nowrap|Trojan [5]{{·}}background [6]}} | orbit_ref = | epoch = 23 March 2018 (JD 2458200.5) | uncertainty = 0 | observation_arc = 63.33 yr (23,130 d) | aphelion = 5.7641 AU | perihelion = 4.6383 AU | semimajor = 5.2012 AU | eccentricity = 0.1082 | period = 11.86 yr (4,333 d) | mean_anomaly = 194.78° | mean_motion = {{Deg2DMS|0.0831|sup=ms}} / day | inclination = 15.950° | asc_node = 316.98° | arg_peri = 16.833° | jupiter_moid = 0.398 AU | tisserand = 2.9120 | dimensions = {{val|40|x|40|ul=km}}[8] | mean_diameter = {{val|49.25|0.52|u=km}}[9] | rotation = {{val|12.807|0.016|ul=h}}[10] | albedo = {{val|0.061|0.008}}[9] | spectral_type = C {{small|(assumed)}}[12] B–V {{=}} {{val|0.680|0.060}}[13] V–R {{=}} {{val|0.440|0.040}}[13] V–I {{=}} {{val|0.970|0.032}}[12] | abs_magnitude = 10.2[9] 10.3[1][12] }}{{mp|(5119) 1988 RA|1}}, provisional designation {{mp|1988 RA|1}}, is a Jupiter trojan from the Trojan camp, approximately {{convert|49|km|abbr=out|sp=us}} in diameter. It was discovered on 8 September 1988 by Danish astronomer Poul Jensen at the Brorfelde Observatory near Holbæk, Denmark.[1] The dark Jovian asteroid has a rotation period of 12.8 hours.[12] It has not been named since its numbering in March 1992.[22] DiscoveryOn the night this minor planet was discovered at Brorfelde Observatory, Poul Jensen also discovered the Jupiter trojan {{mpl|(6002) 1988 RO}},[23] the 12-kilometer size main-belt asteroid {{LoMP|9840|{{mp|(9840) 1988 RQ|2}}}},[24] as well as {{LoMP|12689|{{mp|(12689) 1988 RO|2}}}}, {{mpl|(14364) 1988 RM|2}}, {{LoMP|14837|{{mp|(14837) 1988 RN|2}}}}, and {{LoMP|24664|{{mp|(24664) 1988 RB|1}}}}, all main-belt asteroids of inner, middle and outer region of the asteroid belt, respectively. A first precovery was taken at Palomar Observatory in December 1954, extending the asteroid's observation arc by 34 years prior to its discovery.[1] Orbit and classification{{mp|1988 RA|1}} is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's {{L5}} Lagrangian point, 60° behind its orbit {{cross reference|(see Trojans in astronomy)}}. It is also a non-family asteroid of the Jovian background population.[6] It orbits the Sun at a distance of 4.6–5.8 AU once every 11 years and 10 months (4,333 days; semi-major axis of 5.2 AU). Its orbit has an eccentricity of 0.11 and an inclination of 16° with respect to the ecliptic.Physical characteristics{{mp|1988 RA|1}} is an assumed, carbonaceous C-type asteroid, while most larger Jupiter trojans are D-types. It has a typical V–I color index of 0.97.[12]LightcurveIn February 1994, {{mp|1988 RA|1}} was observed by Stefano Mottola and Anders Erikson at La Silla Observatory in Chile, using the ESO 1-metre telescope and its DLR MkII CCD-camera. The photometric observations were used to build a lightcurve showing a rotation period of {{val|12.807|0.016}} hours with a brightness variation of {{val|0.31|0.01}} magnitude ({{small|U=2+}}).[10] Diameter and albedoAccording to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the Trojan asteroid measures 49.25 kilometers in diameter and its surface has a low albedo of 0.061,[9] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroid of 0.057 and calculates a diameter of 48.48 kilometers based on an absolute magnitude of 10.3.[12] Numbering and namingThis minor planet was numbered on 18 March 1992 ({{small|M.P.C. 19840}}).[22] As of 2018, it has not been named.[1] References1. ^1 2 3 4 5 6 7 {{cite web |title = 5119 (1988 RA1) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=5119 |accessdate = 21 June 2018}} [1][2][3][4][5][6][7][8][9][10][11]2. ^1 {{cite web |title = List of Jupiter Trojans |work = Minor Planet Center |first3 = V. |last3 = Carruba |date = 1 June 2018 |url = https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html |accessdate = 21 June 2018}} 3. ^1 2 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 21 June 2018}} 4. ^1 {{cite web |title = 6002 (1988 RO) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=6002 |accessdate = 31 August 2016}} 5. ^1 {{cite web |title = JPL Small-Body Database Browser: 9840 (1988 RQ2) |url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2009840 |publisher = Jet Propulsion Laboratory |accessdate = 31 August 2016}} 6. ^1 2 3 4 {{cite journal |first1 = T. |last1 = Grav |first2 = A. K. |last2 = Mainzer |first3 = J. M. |last3 = Bauer |first4 = J. R. |last4 = Masiero |first5 = C. R. |last5 = Nugent |date = November 2012 |title = WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759...49G |journal = The Astrophysical Journal |volume = 759 |issue = 1 |page = 10 |bibcode = 2012ApJ...759...49G |doi = 10.1088/0004-637X/759/1/49 |arxiv = 1209.1549 |access-date= 21 June 2018}} (online catalog) 7. ^1 2 {{cite web |title = Asteroid (5119) 1988 RA1 – Proper Elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=5119&pc=1.1.6 |access-date= 21 June 2018}} 8. ^1 {{cite web |title = Asteroid (5119) 1988 RA1 |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=5119 |accessdate = 21 June 2018}} 9. ^1 2 3 4 5 6 {{cite web |title = LCDB Data for (5119) |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=5119%7C |accessdate = 21 June 2018}} 10. ^1 2 {{cite journal |display-authors = 6 |first1 = Stefano |last1 = Mottola |first2 = Mario |last2 = Di Martino |first3 = Anders |last3 = Erikson |first4 = Maria |last4 = Gonano-Beurer |first5 = Albino |last5 = Carbognani |first6 = Uri |last6 = Carsenty |first7 = Gerhard |last7 = Hahn |first8 = Hans-Josef |last8 = Schober |first9 = Felix |last9 = Lahulla |first10 = Marco |last10 = Delbò |first11 = Claes-Ingvar |last11 = Lagerkvist |date = May 2011 |title = Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects |url = http://iopscience.iop.org/article/10.1088/0004-6256/141/5/170/pdf |journal = The Astronomical Journal |volume = 141 |issue = 5 |page = 32 |bibcode = 2011AJ....141..170M |doi = 10.1088/0004-6256/141/5/170 |access-date= 24 May 2016}} 11. ^1 2 {{Cite journal |first1 = Joseph P. |last1 = Chatelain |first2 = Todd J. |last2 = Henry |first3 = Linda M. |last3 = French |first4 = Jennifer G. |last4 = Winters |first5 = David E. |last5 = Trilling |date = June 2016 |title = Photometric colors of the brightest members of the Jupiter L5 Trojan cloud |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016Icar..271..158C |journal = Icarus |volume = 271 |pages = 158–169 |bibcode = 2016Icar..271..158C |doi = 10.1016/j.icarus.2016.01.026 |access-date= 13 June 2016}} }} External links
3 : Jupiter trojans (Trojan camp)|Discoveries by Poul Jensen|Astronomical objects discovered in 1988 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。